Use \lstinline for function names referring to listing

chapters/functions.tex

@@ -1442,11 +1442,11 @@ \subsection{Using the Derivative Annotation}\label{using-the-derivative-annotati
 In the example above \lstinline!zeroDerivative=y! and \lstinline!zeroDerivative=offset! imply that
 \begin{equation*}
 \begin{aligned}
-\udfrac{}{t}f(x(t),y(t),o(t))
-&= \pdfrac{f}{x} \udfrac{x}{t} + \pdfrac{f}{y} \udfrac{y}{t} + \pdfrac{f}{o} \udfrac{o}{t}\\
-&= \pdfrac{f}{x} \udfrac{x}{t} + \pdfrac{f}{y} \cdot 0 + \pdfrac{f}{o} \cdot 0\\
-&= \pdfrac{f}{x} \udfrac{x}{t}\\
-&= \mathit{fDer} \cdot \udfrac{x}{t}
+\udfrac{}{t}\text{\lstinline!f!}(x(t),y(t),o(t))
+&= \pdfrac{\text{\lstinline!f!}}{x} \udfrac{x}{t} + \pdfrac{\text{\lstinline!f!}}{y} \udfrac{y}{t} + \pdfrac{\text{\lstinline!f!}}{o} \udfrac{o}{t}\\
+&= \pdfrac{\text{\lstinline!f!}}{x} \udfrac{x}{t} + \pdfrac{\text{\lstinline!f!}}{y} \cdot 0 + \pdfrac{\text{\lstinline!f!}}{o} \cdot 0\\
+&= \pdfrac{\text{\lstinline!f!}}{x} \udfrac{x}{t}\\
+&= \text{\lstinline!fDer!} \cdot \udfrac{x}{t}
 \end{aligned}
 \end{equation*}
 \end{nonnormative}
@@ -1498,11 +1498,11 @@ \subsection{Using the Derivative Annotation}\label{using-the-derivative-annotati
 Therefore \lstinline!h! indirectly includes the derivative with respect to \lstinline!y! as follows:
 \begin{equation*}
 \begin{aligned}
-\udfrac{}{t}\mathit{fg}(x(t))
-&= \udfrac{}{t}f(x(t),g(x(t)))\\
-&= \pdfrac{f}{x} \udfrac{x}{t} + \pdfrac{f}{y} \pdfrac{g}{x} \udfrac{x}{t}\\
-&= \left(\pdfrac{f}{x} + \pdfrac{f}{y} \pdfrac{g}{x} \right) \udfrac{x}{t}\\
-&= h(x,y) \udfrac{x}{t}
+\udfrac{}{t}\text{\lstinline!fg!}(x(t))
+&= \udfrac{}{t}\text{\lstinline!f!}(x(t),\text{\lstinline!g!}(x(t)))\\
+&= \pdfrac{\text{\lstinline!f!}}{x} \udfrac{x}{t} + \pdfrac{\text{\lstinline!f!}}{y} \pdfrac{\text{\lstinline!g!}}{x} \udfrac{x}{t}\\
+&= \left(\pdfrac{\text{\lstinline!f!}}{x} + \pdfrac{\text{\lstinline!f!}}{y} \pdfrac{\text{\lstinline!g!}}{x} \right) \udfrac{x}{t}\\
+&= \text{\lstinline!h!}(x,y) \udfrac{x}{t}
 \end{aligned}
 \end{equation*}
 \end{nonnormative}